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She said: "It's a really great little school actually for the reasons I think that it really focuses on kindness, it's a really big thing in that school and the pastoral care is amazing.

"There's a policy that if your child is having a party, unless every child in the class is invited you don’t give out the invites in class, which I think is quite a good thing as you don’t feel excluded.

"There are signs everywhere saying be kind, that’s the ethos of the school. They don’t encourage you to have best friends."

Prince George is already a pupil at the London school (Image: Twitter)

Princess Charlotte, hide behind her mother the Duchess of Cambridge as she arrives for her first day (Image: PA Wire/PA Images)